06 March 2008

An interesting feature of these maps is that while most areas seem to be saturated with either WM or SB, there's a relative lack of saturation on the east coast -- neither Starbucks nor Walmart has acheived high per capita distribution here. Do east coast shoppers and coffee drinkers have a stronger preference for independents or regional chains?
Here are a couple more maps for comparison--
Median household income (2006 data):